Co-phasing the Large Binocular Telescope: status and performance of LBTI/PHASECam

D. Defrère; P. Hinz; E. Downey; D. Ashby; V. Bailey; G. Brusa; J. Christou; W. C. Danchi; P. Grenz; J. M. Hill; W. F. Hoffmann; J. Leisenring; J. Lozi; T. McMahon; B. Mennesson; R. Millan-Gabet; M. Montoya; K. Powell; A. Skemer; V. Vaitheeswaran; A. Vaz; C. Veillet

doi:10.1117/12.2057178

24 July 2014 Co-phasing the Large Binocular Telescope: status and performance of LBTI/PHASECam

D. Defrère, P. Hinz, E. Downey, D. Ashby, V. Bailey, G. Brusa , J. Christou, W. C. Danchi, P. Grenz, J. M. Hill, W. F. Hoffmann, J. Leisenring, J. Lozi, T. McMahon, B. Mennesson, R. Millan-Gabet, M. Montoya, K. Powell, A. Skemer, V. Vaitheeswaran, A. Vaz, C. Veillet

Author Affiliations +

Proceedings Volume 9146, Optical and Infrared Interferometry IV; 914609 (2014) https://doi.org/10.1117/12.2057178
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The Large Binocular Telescope Interferometer is a NASA-funded nulling and imaging instrument designed to coherently combine the two 8.4-m primary mirrors of the LBT for high-sensitivity, high-contrast, and highresolution infrared imaging (1.5-13 μm). PHASECam is LBTI's near-infrared camera used to measure tip-tilt and phase variations between the two AO-corrected apertures and provide high-angular resolution observations. We report on the status of the system and describe its on-sky performance measured during the first semester of 2014. With a spatial resolution equivalent to that of a 22.8-meter telescope and the light-gathering power of single 11.8-meter mirror, the co-phased LBT can be considered to be a forerunner of the next-generation extremely large telescopes (ELT).

Citation Download Citation

D. Defrère, P. Hinz, E. Downey, D. Ashby, V. Bailey, G. Brusa , J. Christou, W. C. Danchi, P. Grenz, J. M. Hill, W. F. Hoffmann, J. Leisenring, J. Lozi, T. McMahon, B. Mennesson, R. Millan-Gabet, M. Montoya, K. Powell, A. Skemer, V. Vaitheeswaran, A. Vaz, and C. Veillet "Co-phasing the Large Binocular Telescope: status and performance of LBTI/PHASECam", Proc. SPIE 9146, Optical and Infrared Interferometry IV, 914609 (24 July 2014); https://doi.org/10.1117/12.2057178

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